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Regex isn't hard enough, so I present you with a crossword where all hints are regular expressions! I confess at first it looked like the hints don't contain enough information to solve the puzzle but after some slow but steady progress I can confirm that they do 🤣 The original puzzle is from https://puzzles.mit.edu/2013/coinheist.com/rubik/a_regular_crossword/ I shared this on my blog: https://mathspp.com/blog/problems/regex-crossword 41 comments
  @mathsppblog "Corporate needs you to take a look at these two photos and tell the differences." Photo A: pages of a Medieval grimoire. Photo B: that.  @mathsppblog reminds me of Regex Crossword on Android https://play.google.com/store/apps/details?id=com.michelsen.regexcrossword  @mathsppblog   I was doing those, a few years ago. And my experience has been that yes, each has one and only one unique solution. And you can find it by applying logic. I totally got "nerd sniped" on that, some years ago. So I guess I'm "a recovering hex grid regex addict." 😆 @mathsppblog Is each entry a word of the English language (or at least a word accepted by most English language crossword makers)? @legendarybassoon @mathsppblog restricting this further to natural-language words would make the regexps extend far beyond the edge of the page :) but it's a fascinating idea @ocramz @mathsppblog "each word must satisfy the corresponding regexp in addition of being a word of the English language" does the trick  @mathsppblog   @aral @mathsppblog this is awesome and I really want to give it a shot But like...can we really call .* a hint???   @mathsppblog@fosstodon.org this reminds me a lot of OFRAK tetris, created by an engineer at a security company for PR reasons, it's tetris except every block is a valid ARM instruction @mathsppblog @mathsppblog Some dear friends made kinda the opposite thing, you need to guess the regex: Regexle https://regexle.ithea.de/ @mathsppblog can we assume that each regex represents the whole string and not a substring ? Like r.*t can match « rabbit », but not « straight » ?   @mathsppblog Oh yeah, this thing was a lot of fun! My only regret is that there is only one ^^
@mathsppblog I remember doing this several years ago when I was in uni (now realising how far in stretching the definition of several...). Took me a couple of weeks, mostly doing it on the train. Really enjoyed the puzzle. @mathsppblog This is right up my alley, so I'm very sad it's not accessible.    @mathsppblog This went around several years ago and I spent a couple days solving it obsessively in short breaks from work. |
Gregory's Server
@mathsppblog I've seen some simple regex puzzles, but this is more to my liking. ✅